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Finding the Fourth Proportional to 405.22, 607.70 and 131.24

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Solution

The fourth proportional to 405.22, 607.70 and 131.24 is: 196.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.22 : 607.70 = 131.24 : x
  2. Step 2: Convert to fraction form
    405.22/607.70 = 131.24/x
  3. Step 3: Cross multiply
    405.22x = 607.70 × 131.24
  4. Step 4: Simplify right side
    405.22x = 79,755.41
  5. Step 5: Solve for x
    x = 79,755.41/405.22
  6. Step 6: Final answer
    x = 196.82

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